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  <title>Document</title>
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<body>
  <script>
    // 剩余
    // let fn = (n, ...test) => {
    //   console.log(test)  // [2, 3]
    // }
    // fn(1, 2, 3)

    let arr = ['q', 'w', 'e', 'r']
    let [val, ...result] = arr   // 解构配合剩余参数
    console.log(val)
    console.log(result)
  </script>
</body>
</html>